Tag Archive: artificial spawning

Jul 08 2015

Induction of spawning in gilthead seabream, Sparus aurata in Egypt (Video)

This video was filmed in a governmental marine hatchery located in Alexandria. The video begins with the out-door tanks of the broodstock showing their feeding activity then passing quickly by the indoor tanks. The spawning practices especially the egg sampling and the implanting of hormone capsule is shown in the end of the video. Gilthead …

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Permanent link to this article: http://fishconsult.org/?p=12779

Oct 14 2013

Hatchery management (updated 2013 version)

The presentation starts with a fact sheet related to fish reproduction. Mode of fish production has been addressed and also the rationality of collecting fish production and fish seeds with a comparison with hatchery produced seeds. Fish sexual maturation in relation to influencing factors has been discussed in this presentation. Hatchery management is adequately addressed …

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Permanent link to this article: http://fishconsult.org/?p=9497

Jul 04 2013

Gilthead seabream, Sparus aurata (Distribution – Biology – Aquaculture)

Review: Abdel Rahman El Gamal Introduction: Gilthead seabream, Sparus aurata is called “dorade” in France, “Orata” in Italy, and “tsipoúra” in Greece. The species is generally appreciated by consumers. While the maximum recorded total length of the species was 70 cm and maximum weight about was 17 kg, the common standard length is about 35 …

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Permanent link to this article: http://fishconsult.org/?p=8209

Jun 03 2012

Harvesting and sexing of grass carp (Ctenopharyngodon idella) broodstock (Egypt) – Video

This video presents the harvesting and sexing grass carp (Ctenopharyngodon idella) broodstock prior to the artificial spawning of grass carp. Since mid 1990s, the use of herbicides in the River Nile and irrigation canals has been banned in Egypt. Instead, grass carp has been used as the biological control agent for aquatic plants. This video …

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Permanent link to this article: http://fishconsult.org/?p=3669

Feb 07 2012

Alternate artificial spawning protocol of Rio Grande silvery minnow to minimize genetic. By: Tave and Hutson

Credit: Douglas Tave and Alison Hutson (USA): Alternate artificial spawning protocol of Rio Grande silvery minnow to minimize genetic. and to maximize the retention of rare alleles. This paper addresses the following topics: Captive Propagation and Genetics, Inbreeding, Effective breeding number, Genetic drift, Allele frequency and Artificial Propagation of Rio Grande Silvery Minnow. [important]Alternate artificial …

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Permanent link to this article: http://fishconsult.org/?p=2411

Feb 05 2012

Fish ovulation and egg overripe

This 2-slide information bite addresses the ovulation of fish female in regard to timing and indicators. Focus has been placed on the importance of collecting the spawn short time after ovulation before eggs turn overripe which means losing the chance for fertilization. The period from ovulation and eggs turn overripe vary according to some factors …

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Permanent link to this article: http://fishconsult.org/?p=2367

Dec 26 2011

Artificial spawnining of African catfish, Clarias gariepinus (hormonal injection) – Video)

The video shows the injection of an African catfish (Clarias gariepinus) female. You may notice the small-medium size of female broodstock, the place of injection (dorsal part) and covering fish eyes as a means of calming. Anesthesia may be required especially in larger broodstock. Note: the credit of these video clips goes to colleagues who …

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Permanent link to this article: http://fishconsult.org/?p=2154